3 Fine tuning knobs enable to adjustment up to +/- 5 degrees in horizontal, non-slip wear- rubber pad and the locking ring designed dials the camera ly leveled for stable photography. Standard 3/8inch top external stud and 3/8inch bottom screw thread, which is for different types of tripods. Exquisite workmanship, aluminum alloy material made, precision processing, oxidation , for long service life. Large load capacity but in design, portable to carry, for outdoor travelling photographers. Professional photography accessories, widely used for precise leveling in portrait video . Colour:black Material:Aluminum alloy Size:. 46 x 67mm Package Contents: 2 x Leveling Base Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.